When posting a Transfer Order, the "Gen. Bus. Posting Group" of the "General Posting Setup" is used, the value of which is empty.

The problem is that if you post "Item Journal" and the user mistakenly leaves the "Gen. Bus. Posting Group" field empty, the same G/L account is used as in the Transfer Order.

It would be better if there was no combination in the "General Posting Setup"  where the "Gen. Bus. Posting Group" field is empty.

The solution could be to add a new field "Gen. Bus. Posting Group" to the "Inventory Setup" table and use it when posting the Transfer Order.